131782681 has 2 divisors, whose sum is σ = 131782682. Its totient is φ = 131782680.

The previous prime is 131782667. The next prime is 131782711. The reversal of 131782681 is 186287131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 126765081 + 5017600 = 11259^2 + 2240^2 .

It is a cyclic number.

It is not a de Polignac number, because 131782681 - 2¹¹ = 131780633 is a prime.

It is a super-2 number, since 2×131782681² = 34733350023095522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 131782681.

It is not a weakly prime, because it can be changed into another prime (131782601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65891340 + 65891341.

It is an arithmetic number, because the mean of its divisors is an integer number (65891341).

Almost surely, 2^131782681 is an apocalyptic number.

It is an amenable number.

131782681 is a deficient number, since it is larger than the sum of its proper divisors (1).

131782681 is an equidigital number, since it uses as much as digits as its factorization.

131782681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16128, while the sum is 37.

The square root of 131782681 is about 11479.6638016973. The cubic root of 131782681 is about 508.8847615522.

The spelling of 131782681 in words is "one hundred thirty-one million, seven hundred eighty-two thousand, six hundred eighty-one".